PMID- 3713995 OWN - NLM STAT- MEDLINE DCOM- 19860715 LR - 20190912 IS - 0143-4179 (Print) IS - 0143-4179 (Linking) VI - 7 IP - 3 DP - 1986 Apr TI - Effect of oxytocin on acute enkephalin tolerance in mice. PG - 247-50 AB - Intracerebroventricular (i.c.v.) administration of a test dose of 0.5 microgram D-Met2-Pro5-enkephalinamide (ENK) resulted in analgesia. Acute tolerance developed if a tolerance-inducing high dose of 5 micrograms ENK was administered i.c.v. prior to the test dose. Tolerance appeared as a reduction of the analgesic effect of the test dose. Subcutaneous (s.c.) injection of oxytocin (OXT) inhibited the development of tolerance. It is suggested that OXT is able to modify the development of tolerance to enkephalins, which are ligands of delta-opiate rather than mu-opiate receptors. FAU - Schwarzberg, H AU - Schwarzberg H FAU - Kovacs, G L AU - Kovacs GL FAU - Penke, B AU - Penke B FAU - Telegdy, G AU - Telegdy G LA - eng PT - Journal Article PL - Netherlands TA - Neuropeptides JT - Neuropeptides JID - 8103156 RN - 50-56-6 (Oxytocin) SB - IM MH - Analgesia MH - Animals MH - Cerebral Ventricles/drug effects/*physiology MH - Drug Tolerance MH - Injections, Intraventricular MH - Male MH - Mice MH - Mice, Inbred Strains MH - Oxytocin/*pharmacology EDAT- 1986/04/01 00:00 MHDA- 1986/04/01 00:01 CRDT- 1986/04/01 00:00 PHST- 1986/04/01 00:00 [pubmed] PHST- 1986/04/01 00:01 [medline] PHST- 1986/04/01 00:00 [entrez] AID - 0143-4179(86)90018-1 [pii] AID - 10.1016/0143-4179(86)90018-1 [doi] PST - ppublish SO - Neuropeptides. 1986 Apr;7(3):247-50. doi: 10.1016/0143-4179(86)90018-1.